Angular rotating twyer



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SAML. H. CAMP, OF HARTFORD, CONNECTICUT.

ANGU'LAR ROTATING TWYER.

To all whom it may concern:

Be it known that I, SAMUEL H. CAMP, of Hartford, in the county ofHartford and State of Connecticut, have invented a new and usefulImprovement on a Square Rectangular Revolving Grate or Twyer-Iron forForges; and I do hereby declare that the following is a full, clear, andexact description.

The nature of my invention consists in the employment of a squarerectangular hollow revolving grate or twyer iron for forges, perforatedwith apertures of different sizes forming bars in the sides forregulating the admission of air into the fire of the forge, and forbreaking the scale of metal by edges of the grate or twyer iron when itis revolved to prevent the twyers from being choked.

To enable others skilled in the art to make and use my invention I willproceed to describe its construction and operation, reference being hadto the annexed drawings, making a part of this specification.

Figure 1 is a plan view of the hearth or bed plate of the grate or twyerplaced therein; and of the tube which receives the nozzle of thebellows. Fig. 2 is a vertical section of the same on the line 2 aFig. 1. Fig. 3 is a side elevation of the air chamber or box, showingthe opening in which is inserted the tube for receiving the nozzle ofthe bellows. Figs. 4, 5, 6 and 7 are views of the four sides of thegrate or twyer iron, exhibiting the different sized air valves orapertures in each. Fig. 8 is a view of the crank for turning the grateor twyer iron.

The air chamber is a square box A, Figs. 2 and 3, about six and one halfinches from side to side, on the top of which is a circular convex bedplate or hearth B, of about twelve inches diameter; and on the underside of said air chamber is the usual sliding door C, for dropping theashes and cinders which may fall into it, and also for admitting the airto reduce the temperature of the hearth plate and grate, or twyer ironwhen the forge is not in operation.

The tube D, for receiving the nozzle of the bellows, is insertedcentrally in the side of the air chamber A, in the usual manner.

I make my grate or twyer iron E square sided and oblong, as shown inFigs. 1, 2, 4:, 5, 6, and 7. In the four sides are oblong apertures a,b, 0, (Z, of different sizes in each,

which open into each other in the inside of the grate or twyer iron,forming a hollow interior to the same as seen in Fig. 2, lengthwisethrough the grate or twyer iron, and firmly fastened in it, passes arotary shaft F, on one end of which is attached a crank for turning thegrate or twyer iron, and regulating the admissionof air in the fire asseen in Figs. 1, 2, 3.

In the center of the bed plate or hearth B is an orifice e, e, e, e, ofexactly the size and shape of one side of the grate or twyer iron, intowhich orifice the grate or twyer iron is inserted, having its upper sideflush with the top of said hearth plate as seen in Figs. 1, 2. The lowerside of said orifice is made beveling on two opposite sides, as seen atf f Fig. 2 for the purpose of permitting the corners of the grate o-rtwyer iron to pass when it is turned.

The grate or twyer iron E is suspended in the air chamber A immediatelybelow the orifice, e, e, in the hearth plate B, as seen in Fig. 2, andit is supported by the rotary shaft E which passes through two sides ofthe air-chamber at right angles to the line of the tube D, as seen inFigs. 1 and 3.

By turning the shaft F, any of the four sides of the grate or twyer ironmay be presented to the orifice e, e, and the quantity of air admittedto the fire can thus be increased or diminished at pleasure, in consequence of the apertures a, b, 0, (Z, in each side, respectively being ofdifferent capacity, allowing more or less air to pass from the airchamber A, thus regulating the blast.

The corners of the grate or twyer iron, are elevated above the level ofthe hearth plate B, by turning the shaft F back and forth, and the firemay thus be efiectually stirred without the poker. The ashes and cinderswill pass between the beveled sides of the orifice f f and the sides ofthe twyers into the bottom of the air chamber A, to be removed when theyhave accumulated by slipping out the slide C, as before described.

By constructing my twyer with more than one oblong aperture in the sideor sides, the space between the two openings forms a bar and preventsthe coal from falling into the twyer. My twyer being formed with edges,

when it is turned around the scale that may be formed between it and thesides, is easily broken by the action of the edge or edges of the saidtwyer iron. In spherical and conical twyers, the scale has often to bechipped away with a chisel, which is avoided by the square, oblongtwyer.

As a regulator of the blast, two different currents can be admitted fromthe outside of my twyer at once, by turning the twyers so as to make theedge project above the plate like an angle, the draft entering throughthe apertures of the two opposite sides.

Having thus explained my invention, I claim The twyer of a square,rectangular, or hexagon form, having edges, and revolving not on aneccentric axis, but a central axis, to break off the scale formed by thefire upon the metal, by turning around the twyer; when such twyer isconstructed hollow, and with apertures of different sizes upon itsdifferent faces, through which the blast is forced; the whole beingconstructed sub- 20 stantially as herein described.

SAML. H. CAMP.

Witnesses:

THOMAS J. SALES, R. R. BUCK.

